30/70=x/40000

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Solution for 30/70=x/40000 equation: 


x in (-oo:+oo)

30/70 = x/40000 // - x/40000

30/70-(x/40000) = 0

3/7-1/40000*x = 0 // - 3/7

-1/40000*x = -3/7 // : -1/40000

x = -3/7/(-1/40000)

x = 120000/7

x = 120000/7

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